Metabones EF yashics glass

[enny]

I have few yashics ml lenses can I use my yashics glass on ef metabones with adapter ? 
 

thansk 

[eatstoomuchjam]

If you can adapt the Yashica glass to EF mount, you can use it with an EF focal reducer.

[Ninpo33]

Do you have a link to the Yashica lenses?  There are a couple of options but it all boils down to flange distance if you can find a speedbooster with the same flange distance or close enough you might be able to adapt the mount. It needs to be perfect though down to 0.05 mm or you won’t hit infinity focus. 
 

Adapting to EF might also work but I would stay with one adapter if possible instead of mixing and matching.